<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- <link rel="stylesheet" href="demo.css"> -->
    <script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
    <link href="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.staticfile.org/twitter-bootstrap/5.1.1/js/bootstrap.bundle.min.js"></script>
    <script src=" https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
    <!-- <script src="demo.js"></script> -->
    <style>
        #header{
            display: flex;
        }
        img{
            width: 70px;
        }
        ul{
            list-style: none;
        }
        ul li{
            float: left;
            margin-left: 20px;
        }
        .c2 li{
            clear: both;
            margin: 0 -30px;
        }
        .c2{
            display: none;
        }
        .c1>li:hover .c2{
            display: block;
        }
    </style>
</head>
<body>
    <div id="header" class="header">
        <img src="./img/11.png" alt="">
        <ul class="c1">
            <li><a href="#HomePage">HomePage</a></li>
            <li><a href="#Personal">Personal</a></li>
            <li><a href="#My skill">My skill</a>
                <ul class="c2">
                    <li><a href="#">HTML5</a></li>
                    <li><a href="#">CSS3</a></li>
                    <li><a href="#">JavaScript</a></li>
                    <li><a href="#">jQuery</a></li>
                    <li><a href="#">Bootstrap</a></li>
                    <li><a href="#">ES6</a></li>
                    <li><a href="#">Vue3</a></li>
                    <li><a href="#">Angular</a></li>
                    <li><a href="#">React</a></li>
                    <li><a href="#">PHP</a></li>
                    <li><a href="#">微信小程序开发</a></li>
                </ul>
            </li>
            <li><a href="#My prise">My prise</a></li>
            <li><a href="#My resume">My resume</a></li>
            <li><a href="#My grown">My grown</a></li>
        </ul>
        <button>点哦</button>
    </div>
</body>
</html>